These batteries cannot be "overcharged." If you charge your laptop to 100 percent and then leave it plugged in, the charger will cease charging the battery. The laptop will just operate on the power cord. There is no danger of harming the battery if it is charged past its capacity.
The only danger with leaving a laptop plugged in but turned off is that it will drain the battery over time. However, this is not likely to happen unless the computer is left on for several days or more. In fact, most laptops are designed to limit how long they can be left on so they don't drain their batteries too fast.
If you want to extend the life of your battery, you should turn off your laptop every few months while still keeping it plugged in. This will prevent it from running down the battery faster. Of course, if you forget about it, there is no harm in letting it run down completely before replacing it.
The laptop battery cannot be overcharged. After the battery has discharged little, the charger will reactivate and top off the battery. This process can be repeated indefinitely.
Overcharging leads to overheating and may cause the battery to smoke, smell, or explode. Always unplug your laptop when it is fully charged.
Overcharging a laptop battery is not feasible. Leaving your computer plugged in after it has been fully charged does not result in overcharging or harm to the battery. Keeping the battery on the charger all the time, on the other hand, may not be the greatest choice if you want to maximize the battery life of your laptop. But overcharging itself isn't harmful.
Your laptop battery cannot "overcharge" and cause damage to itself. It is intelligent enough to avoid the charging energy. Batteries that have been fully charged have just 300-500 discharge cycles. Those charged just up to 80% get nearly four times as many recharge cycles. Batteries that are not used for a while tend to lose their ability to hold a charge, so it is best not to let them sit too long without being recharged.
It is recommended to charge your laptop battery completely before putting it away for several months or more. This will maximize its life. Laptop batteries should be charged to at least 90% before being stored for long periods. If you leave a battery under 100% charged for too long, then it may leak electrolyte into the case. This could shorten the life of your battery.
If you leave your laptop battery uncharged for longer than this, then it will eventually die. When this happens there is nothing you can do except throw out the battery. This shouldn't happen though, because a fully charged battery has a longer lifespan than one that is partially used up. Your battery should feel warm when charging, which means that the circuit inside is working properly. If it gets cold instead, then this means that there is a problem with your charger or cable. You should take your laptop to a professional for repair rather than trying to fix it yourself.
While overcharging is not an option, leaving your laptop battery drained is. Leaving your battery depleted for an extended amount of time might harm its ability to completely charge again or charge at all. However, a battery that has been fully discharged can be restored by exposing it to full charges every other day for several weeks.
However, some batteries cannot be restored to their original state after being fully discharged, so be sure to follow any specific instructions that come with your battery pack. If you have any questions about how to care for your battery, ask the manufacturer.
These batteries are built to survive many charging cycles. These batteries cannot be overcharged, which means that once fully charged, they will cease charging. These batteries no longer receive electricity, which is now sent straight to your laptop's power source. When this happens, the computer will shut down to prevent damage to either the battery or the device it is powering up.
Overcharging occurs when you try to force too much current into a battery, causing excessive heat and potentially leading to fire. Batteries should only be charged as far as they can be recharged, which means they should not be left at any higher voltage than their written rating. If you do charge your battery beyond what it says on the label, it could cause damage to your device.
If you leave your battery in constant connection to a charger, it will drain its capacity faster and may even break down completely if used in this way for several years. Batteries must periodically be discharged, or else they will fail prematurely. Discharge your battery by using it as little as possible, then store it in a cool, dark place. Do not use battery testers on batteries you intend to keep fresh for more than one year.
Overheating caused by charging a battery beyond its limit can result in firing of some chemicals within the battery, which can cause internal short circuits and release poisonous gases. This is called "thermal runaway".